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A window air conditioner consumes 1500 W of electric power and has COP = 3.7. If it runs continuously for 18h , how much heat gets removed from the house? Express your answer to two significant figures and include the appropriate units.
Your roommate is working on his bicycle and has the bike upside down. He spins the 52.0 -diameter wheel, What is the pebbles acceleration
I am standing on a 5m high platform and throw a 0.2kg ball horizontally with a speed of 10m/s. How fast will it be going when it reaches the ground
Water has the following thermodynamic constants: (1) specific heat liquid = 4.18 J/g °C, solid = 2.09 J/g °C, gas = 1.89 J/g °C, (2) heat of fusion = 334 J/g, and (3) heat of vaporization = 2257 J/g. how much heat is required to melt the sample
A 3.00 x 102-kg piano is being lifted at a steady speed from ground level straight up to an apartment 10.00 m above the ground. The crane that is doing the lifting produces a steady power of 4.00 x 102 W. Explain by how much time does it take to li..
A uniform magnetic field points out of the page. The field fully penetrates a wire loop in the plane of the page. what is the averaged induced current
throughout the process the mechanical device pushing the piston to compress gas is found to expend 4 kJ of energy. What is the magnitude of the heat flow between heat reservoir and the gas and in what direction does the heat flow occur.
The small piston of a hydraulic press has an area of 8.00 cm2. If the applied force is 25.0 N, find the area of the large piston to exert a pressing force of 3600 N
The primary winding of a transformer has 1200 turns, and is connected to 120 V A.C. (r.m.s. value). The secondary has a 25 W load resistor, Continuing, how many turns are in the secondary winding
One end of a 5.0 m long light string is attached to the ceiling and a small rock of mass m is attached to the other end of the string. What is the mass m of the rock
An ideal inductor of 14 mH has a sinusoidal voltage across it of amplitude 38. What is the amplitude of the sinusoidal current through the inductor
An ambulance with a siren emitting a whine at 1600 Hz overtakes and passes a cyclist pedaling a bike at 2.44 m/s. How fast is the ambulance moving
Determine the phase and group velocities for a monatomic lattice. Plot the velocities versus the wave vector k and give a brief discussion of their significance.
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